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<span class="comment"> /*
     treeitem.cpp

     A container for items of data supplied by the simple tree model.
 */</span>

 #include &lt;QStringList&gt;

 #include &quot;treeitem.h&quot;

 TreeItem::TreeItem(const QVector&lt;QVariant&gt; &amp;data, TreeItem *parent)
 {
     parentItem = parent;
     itemData = data;
 }

 TreeItem::~TreeItem()
 {
     qDeleteAll(childItems);
 }

 TreeItem *TreeItem::child(int number)
 {
     return childItems.value(number);
 }

 int TreeItem::childCount() const
 {
     return childItems.count();
 }

 int TreeItem::childNumber() const
 {
     if (parentItem)
         return parentItem-&gt;childItems.indexOf(const_cast&lt;TreeItem*&gt;(this));

     return 0;
 }

 int TreeItem::columnCount() const
 {
     return itemData.count();
 }

 QVariant TreeItem::data(int column) const
 {
     return itemData.value(column);
 }

 bool TreeItem::insertChildren(int position, int count, int columns)
 {
     if (position &lt; 0 || position &gt; childItems.size())
         return false;

     for (int row = 0; row &lt; count; ++row) {
         QVector&lt;QVariant&gt; data(columns);
         TreeItem *item = new TreeItem(data, this);
         childItems.insert(position, item);
     }

     return true;
 }

 bool TreeItem::insertColumns(int position, int columns)
 {
     if (position &lt; 0 || position &gt; itemData.size())
         return false;

     for (int column = 0; column &lt; columns; ++column)
         itemData.insert(position, QVariant());

     foreach (TreeItem *child, childItems)
         child-&gt;insertColumns(position, columns);

     return true;
 }

 TreeItem *TreeItem::parent()
 {
     return parentItem;
 }

 bool TreeItem::removeChildren(int position, int count)
 {
     if (position &lt; 0 || position + count &gt; childItems.size())
         return false;

     for (int row = 0; row &lt; count; ++row)
         delete childItems.takeAt(position);

     return true;
 }

 bool TreeItem::removeColumns(int position, int columns)
 {
     if (position &lt; 0 || position + columns &gt; itemData.size())
         return false;

     for (int column = 0; column &lt; columns; ++column)
         itemData.remove(position);

     foreach (TreeItem *child, childItems)
         child-&gt;removeColumns(position, columns);

     return true;
 }

 bool TreeItem::setData(int column, const QVariant &amp;value)
 {
     if (column &lt; 0 || column &gt;= itemData.size())
         return false;

     itemData[column] = value;
     return true;
 }</pre>
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